Cook the potatoes in boiling salted water for 10 mins. Drain and set aside.,Meanwhile, heat half the oil in a large frying pan. Working in batches, add the pork chops and cook for 5 mins each side until cooked through. Remove from the pan and set aside.,Add the onion and mushrooms and saute for 3-5 mins until the onion is golden. Remove and set aside.,Preheat the oven 400°F. Heat the remaining oil in a saucepan, add the flour and cook briefly, stirring. Gradually add the stock and the cream, stirring constantly. Bring to a boil and cook for 8 mins over medium heat. Stir in the lemon juice and season to taste. Set aside.,______